There was nothing you could do.
4 seconds sound clip from the The Exorcist movie soundboard.
You can hear this line at 00:45:45 in the Blu-ray version of the movie.
Quote context
[...]
- College presidents shouldn't drink. Tends to set a bad example.
- I figure I saved him from a big temptation.
- Oh, Christ! I should have been there. I wasn't there. I should have been...
- There was nothing you could do.
- Lie down. Give me the butt. Come on.
- Now you think you can sleep?
- Yeah.
- Are you gonna steal my shoes now?
- No.
- I tell fortunes by reading the creases.
- Now, shut up and go to sleep.
[...]